Thread: Multiple source files for one program

  1. #1
    Some Guy
    Join Date
    Jul 2004

    Question Multiple source files for one program

    I've searched and read some of the topics. I've read this. and it's still not working. I can't seem to split up my program into 3 pieces. I've managed to split the program into 2, seperating the header and the class functions/main. But once I seperate main from the class functions, it says Linker Error. I've just about given up. I'm wondering if it just my problem. Is someone could please help, that would great. Here is my simple program (there's no comments).

    #ifndef BANK_H  
    #define BANK_H
    class Bank
    		Bank() { balance = 1000; transactions = 0; interest = .15;}
    		Bank(float itsBalance)
    			{ balance = itsBalance;	transactions = 0; interest = .15;}
    		~Bank() {std::cout << "Destructor called";}
    		void deposit(float depAmount) 
      			{ balance += depAmount; transactions++; }
    		void withdraw(float wdrawAmount) 
      			{ balance -= wdrawAmount; transactions++; }
    		float getInterest() { return interest * balance; }
    		float getBalance() { return balance; }
    		int getTransactions() { return transactions; }
    		void displayMenu();
    		float balance;
    		int transactions;
    		float interest;

    // Bank.cpp
    #include <iostream>
    #include <conio.h>
    #include "Bank.h"
    using namespace std;
    void Bank::displayMenu()
    	cout << "\n\n1: View Balance\n"
    		 << "2: Deposit money\n"
    		 << "3: Withdraw\n"
    		 << "4: View Interest\n"
    		 << "5: View Transactions\n"
    		 << "6: Exit\n\n";
    // main.cpp
    #include <iostream>
    #include <conio.h>
    #include "Bank.h"
    using namespace std;
    int main()
    	Bank account(5000);
    	int choice, amount;
        	cin >> choice;
       		case 1:	cout << "You're balance is $" << account.getBalance(); break;
       		case 2: cout << "How much money would you like to deposit?\n";
    	   			cin >> amount; account.deposit(amount); break;
    	    case 3: cout << "How much money would you like to withdraw?\n";
    	   			cin >> amount; 
           			if(amount > account.getBalance())
          				{ cout << "Sorry, you don't have enough money in the bank\n"; break;}
               		account.withdraw(amount); break;	   			
            case 4: cout << "Your interest is $" << account.getInterest() << endl; break;
            case 5: cout << "You've made " << account.getTransactions() 
            			 << " transactions.\n"; break;
            case 6: exit(0);
            default: cout << "Please enter a valid number!";
        }// while (choice !=6);
        return 0;

  2. #2
    Join Date
    Aug 2002
    Tucson, Arizona
    hmmmm seems to work fine for me what are your linker errors

  3. #3
    Some Guy
    Join Date
    Jul 2004
    Ok, so it is just me!

    Compiler: Default compiler
    Executing g++.exe...
    g++.exe "C:\Program Files\Dev-Cpp\main.cpp" -o "C:\Program Files\Dev-Cpp\main.exe" -fsave-memoized -g3 -I"C:\Program Files\Dev-Cpp\include\c++" -I"C:\Program Files\Dev-Cpp\include\c++\mingw32" -I"C:\Program Files\Dev-Cpp\include\c++\backward" -I"C:\Program Files\Dev-Cpp\include" -L"C:\Program Files\Dev-Cpp\lib"
    C:\DOCUME~1\GABEFL~1\LOCALS~1\Temp/ccaOaaaa.o(.text+0x159): In function `main':
    C:/Program Files/Dev-Cpp/main.cpp:14: undefined reference to `Bank::displayMenu()'

    Execution terminated
    That's what it says. Could it be where my files are saved? They are in C:\Program Files\Dev-Cpp\My Programs
    Alright, I'm going to sleep. I'm exhausted. Thanks for the quick reply. At least I now know I'm doing it correctly.

  4. #4
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    Add bank.cpp to the project
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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